Membrane strapping apparatus

ABSTRACT

A membrance strapping apparatus includes a hold-pull rod pivotally connected with a membrance release unit and a roller unit. A pulling-force adjusting unit is provided between the hold-pull rod and the roller unit and the membrance release unit is provided with a shaft rod for supporting a membrance roll. Thus, a user can conveniently make use of the membrance strapping apparatus to release membrance for carrying out strapping operation. The pulling-force adjusting unit can be operated for controlling pivotal rotation angles of the roller unit to enable a user to adjust directions and tightness of strapping in accordance with practical need and assist the user to conveniently complete strapping work for firmly strapping an article.

BACKGROUND OF THE INVENTION

1. Field of the Invention

This invention relates to a membrane stripping apparatus, particularly to one applied for releasing membrane.

2. Description of the Prior Art

A conventional membrane applicator, as shown in FIG. 1, includes a hold-pull rod 1 having two ends pivotally connected with a membrane release unit 2 and a roller unit 3. The roller unit 3 has two ends respectively provided with a housing 4 and one of the housings 4 is formed with a positioning groove 5, and the membrane release unit 2 is slidably assembled with the positioning grooves 5. The housings 4 are respectively disposed with two gears 6 that are meshed with each other and connected with the roller unit 3. Thus, during use of the conventional membrane applicator, the positioning groove 5 functions to restrict the rotating range of the roller unit 3, and the gears 6 are employed to increase the binding force of the roller unit 3 when the roller unit 3 straps and fixes an article.

However, the conventional membrane applicator has the following defects: (1). The positioning grooves 5 restrict the rotating range of the roller unit 3 so various kinds of articles are impossible to be integrally strapped and fixed; (2). The intervals formed between two ends of the membrane applicator unit 2 and the hold-pull rod 1, as shown in FIG. 1, disable the membrane applicator to carry out complete strapping for an article, resulting in trouble in strapping work to a user. (3). The two housings 4 are respectively provided with two gears 6 and thus, when the gears 6 of one housing 4 get stuck, a user will be unable to carry out strapping work. Therefore, the conventional membrane applicator is necessary to be ameliorated.

SUMMARY OF THE INVENTION

The objective of this invention is to offer a membrane strapping apparatus that is convenient for a user to carry out membrane strapping operation and able to assist the user to complete article strapping work quickly, easily and conveniently. The membrane strapping apparatus in the present invention includes a hold-pull rod having two ends respectively extending to the same direction to form a combination rod and a base. The combination rod is bored with a first positioning hole and a first fixing hole and provided thereon with a quick detaching member, while the base is disposed with a second positioning hole and a second fixing hole. A membrane release unit is pivotally assembled between the base and the combination rod and contains a shaft rod having two ends respectively formed with a first positioning member and a second positioning member respectively corresponding with the first positioning hole and the second positioning hole. The membrane release unit is pivotally combined with the base and the combination rod by the first and the second positioning members. A roller unit assembled between the base and the combination rod is composed of a first roller and a second roller. The first roller and the second roller have their same ends respectively provided with a first gear and a second gear, which are engaged with each other and have their outer side respectively mounted with a housing. A pulling-force adjusting unit positioned between the hold-pull rod and the roller unit consists of a positioning member, an elastic member and a control member. The positioning member is connected with the free end of the elastic member that has its fixed end connected with hold-pull rod. The positioning member can be positioned on the hold-pull rod by resilience of the elastic member, and the control member is connected with both the positioning member and the roller unit.

A membrane roll is fitted around the shaft rod of the membrane release unit of the membrane strapping apparatus and supported by the shaft rod and thus, a user is able to conveniently employ the membrane strapping apparatus to carry out membrane releasing operation. When carrying out strapping work, a user can adjust the pivotal rotation angles of the roller unit via the pull-force adjusting unit, and in cooperation with the decelerating effect of the first and the second gears, the user is able to adjust strapping directions and tightness in accordance with practical need. In brief, the membrane strapping apparatus of this invention can assist a user to quickly, easily and conveniently complete strapping work and firmly strapping articles.

BRIEF DESCRIPTION OF DRAWINGS

This invention will be better understood by referring to the accompanying drawings, wherein:

FIG. 1 is a perspective view of a conventional membrane applicator;

FIG. 2 is a perspective view of a first preferred embodiment of a membrance strapping apparatus in the present invention;

FIG. 3 is an exploded perspective view of the first preferred embodiment of the membrance strapping apparatus in the present invention;

FIG. 4 is a partial exploded perspective view of the first preferred embodiment of the membrance strapping apparatus in the present invention;

FIG. 5 is a partial cross-sectional view of the first preferred embodiment of the membrance strapping apparatus in the present invention;

FIG. 6 is a partial cross-sectional view of the first preferred embodiment of the membrance strapping apparatus in the present invention;

FIG. 7 is a schematic view of the first preferred embodiment of the membrance strapping apparatus in a using condition in the present invention;

FIG. 8 is another schematic view of the first preferred embodiment of the membrance strapping apparatus in a using condition in the present invention;

FIG. 9 is a third schematic view of the first preferred embodiment of the membrance strapping apparatus in a using condition in the present invention;

FIG. 10 is an exploded perspective view of a second preferred embodiment of a membrance strapping apparatus in the present invention; and

FIG. 11 is a partial exploded perspective view of the second preferred embodiment of the membrance strapping apparatus in the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT

A first preferred embodiment of a membrance strapping apparatus 100 in the present invention; as shown in FIGS. 2 and 3, includes a hold-pull rod 10, a membrance release unit 20, a roller unit 30 and a pulling-force adjusting unit 40 as main components combined together.

The hold-pull rod 10 has two ends respectively extending to a same direction to form a combination rod 11 and a base 12. The combination rod 11 is bored with a first positioning hole 111 and a first fixing hole 112, referring to FIG. 4 that shows the location and type of first fixing hole 112. The combination rod 11 is provided thereon with a quick-detaching member 13 composed of a spring 131 and a shaft cover 132, which are received in the first positioning hole 111, with the spring 131 connected with the shaft cover 132. The base 12 has its topside formed with a second positioning hole 121 and a second fixing hole 122 at locations respectively corresponding with the first positioning hole 111 and the first fixing hole 112 and has one side bored with a combination hole 123 corresponding one side of combination rod 11 for the hold-pull rod 10 to be inserted and fixed therein. In this preferred embodiment, the hold-pull rod 10 is a hollow tube and the combination rod 11 of the hold-pull rod 10 is set therein with a tube stopper. The hold-pull rod 10 of this invention can be either a hollow type or a solid type.

The membrance release unit 20 is pivotally assembled between the base 12 and the combination rod 11 and contains a shaft rod 21 having two ends respectively provided with a first positioning member 211 and a second positioning member 212 respectively corresponding to the first positioning hole 111 and the second positioning hole 121 so that the membrance release unit 20 can be pivotally combined with both the base 12 and the combination rod 11 by the first positioning member 211 and the second positioning member 212 and further, the shaft cover 132 of the quick-detaching unit 13 is elastically pushed by the spring 131 to be fitted around the first positioning member 211 of the shaft rod 21. In this preferred embodiment, the shaft rod 21 of the membrance release unit 20 has its circumferential side provided thereon with a plurality of tightening sheets 22 for radially and outward tightening a membrance roll 200 that is fitted around the shaft rod 21.

The roller unit 30 is pivotally mounted between the base 12 and the combination rod 11, consisting of a first roller 31 and a second roller 32. The first roller 31 and the second roller 32 have their same ends respectively fixed with a first gear 33 and a second gear 34. Referring to FIG. 7, the first gear 33 is meshed with the second gear 34, and the number of gear teeth of the first gear 33 is more than that of the second gear 34 and the gear ratio of the first gear 33 and the second gear 34 is between 1.1 and 1.3 and further, the first roller 31 and the second roller 32 have their outer side respectively covered with a housing 35. The roller unit 30 further consists of a first connecting rod 36 and a second connecting rod 37 respectively set in the first roller 31 and the second roller 32. The first connecting rod 36 and the first roller 31 are provided coaxially, and the second connecting rod 37 and the second roller 32 are also provided coaxially. The first connecting rod 36 has two ends respectively and pivotally secured with the first fixing hole 112 and the second fixing hole 122, and the second connecting rod 37 is firmly fixed with the housings 35 and moreover, the first connecting rod 36 and the second connecting rod 37 have their two ends respectively protruding out of one side of the housings 35. In this preferred embodiment, the second connecting rod 37 has one end adjacent to the combination rod 11 formed with a threaded hole 371 and has the circumferential side of the end adjacent to the combination rod 11 provided with male threads 372 for a nut 38 to be screwed thereon, while the first connecting rod 36 has one end adjacent to the combination rod 11 disposed with a threaded hole 361.

The pulling-force adjusting unit 40, referring to FIGS. 4 and 5, is assembled between the hold-pull rod 10 and the roller unit 30, composed of a positioning member 41, and an elastic member 42 and a control unit 43. The positioning member 41 is connected with the free end of the elastic member 42 that has its fixed end connected with the hold-pull rod 10 and thus, the positioning member 41 can be positioned on the hold-pull rod 10 by elastic force of the elastic member 42. The control member 43 is connected with both the positioning member 41 and the roller unit 30. The positioning member 41 is a positioning ring 411 having its underside disposed with a plurality of positioning recesses 412 corresponding to the circumferential side of the combination rod 11, the positioning recesses 412 enabling the positioning ring 411 to be positioned on the combination rod 11. The positioning ring 411 of the positioning member 41 has a central portion of its topside formed with a recessed groove 413 having a bottom side bored with an insert hole 414, and has a circumferential side bored with a through hole 415. The elastic member 42 is a spring received in the first fixing hole 112 of the combination rod 11 and positioned in the recessed groove 413 of the positioning ring 411. The control member 43 is connected with the housing 35 and is adjacent to a location of the second roller 32. In this preferred embodiment, the positioning member 41 further contains a fixing screw 416 that is inserted through the insert hole 414 to be screwed with the threaded hole 361 of the first connecting rod 36 for pressing the topside of the elastic member 42, letting the positioning member 41 positioned in the first fixing hole 112 of the combination rod 11. The control member 43 is an L-shaped control rod 431 having one end inserted in the through hole 415 of the positioning ring 411 and another end provided with male threads 432 corresponding with the threaded hole 371 of second connecting rod 37.

In use of the membrance strapping apparatus 100, referring to FIGS. 7 and 8, firstly, have a membrance roll 200 installed on the membrance release unit 20 of the membrance strapping apparatus 100 and then pull out the membrance of the membrance roll 200 to have the membrance passing around the first roller 31 and the second roller 32 and then attached to an article 300 for carrying out stripping operation. Referring to FIG. 9, the roller unit 30 is pivotally assembled between the base 12 and the combination rod 11 so the roller unit 30 has a comparatively large rotation angle and range and by the gear ratio of the first gear 33 and the second gear 34, the roller unit 30 can produce comparatively large pulling force and binding force when carrying out strapping of the article 30. Thus, the membrance strapping apparatus 100 of this invention enables a user to adjust strapping directions and strapping tightness according to practical need and can assist the user to quickly carry out strapping and securely tighten the article 30. Compared with the conventional membrance applicator, the membrance strapping apparatus of this invention can prevent gear tooth from getting stuck.

Referring to FIGS. 4 and 5, when the roller unit 30 is to be rotated, the rotating angles of the roller unit 30 can be adjusted by the pulling-force adjusting unit 40. Firstly, the positioning ring 411 of the positioning member 41 is pulled upward move out of the fixing hole 112 of the combination rod 11 and meanwhile, the elastic member 42 compressed by the underside of the recessed groove 413 of the positioning ring 411 will restore its resilience to force the positioning recesses 41 to separate from the circumferential side of the combination rod 11, with a separated interval formed between them. Next, the rotating directions of the roller unit 30 are adjusted for matching the article 30 and then the positioning recesses 412 of the positioning member 41 are combined with the circumferential side of the combination rod 11 anew for fixing the rotating angle of the roller unit 30 to position the roller unit 30 at an optimum stripping angle so that a user can carry out strapping operation with convenience.

Referring to FIG. 6, to assemble the membrance release unit 20 or replace the membrance roll 200, firstly, have the first positioning member 211 at one end of the shaft rod 21 pushing against the shaft cover 132 of the quickly-detaching unit 13 to force the shaft cover 132 to compress the spring 131 and have the second positioning member 212 at another end of the shaft rod 21 disengaging from the second positioning hole 121 of the base 12. At this time, a user can remove the membrance release unit 20 and replace the membrance roll 200. Thus, by the quick-detaching unit 13, the membrance release unit 20 of the membrance strapping apparatus 100 of this invention can quickly be removed and the membrance roll 200 can be removed or replaced conveniently.

A second preferred embodiment of a membrance strapping apparatus 100 in the present invention, as shown in FIG. 10, is to have the hold-pull rod 10 formed with a threaded hole 14 at one end adjacent to the base 12, and the membrance strapping apparatus 100 is further provided with a telescopic rod 50 having one end formed with a stud 51 to be threadably combined with the threaded hole 14 of the hold-pull rod 10 to have the underside of the membrance strapping apparatus 100 combined with the telescopic rod 50. Thus, when the membrance strapping apparatus 100 is used, the function of extension and contraction of the telescopic rod 50 enables a user to carry out strapping to the topside of the article 300 or to a portion of the article 300, which is difficult in strapping and hence, the telescopic rod 50 facilitates a user to carry out integral strapping work for the article 300.

Referring to FIG. 10, different from the first preferred embodiment, the second preferred embodiment of the membrance strapping apparatus 100 has the membrance release unit 20 further provided with a first position-limiting block 23 and a second position-limiting block 24. The first position-limiting block 23 has a central portion bored with a threaded hole 231, and the shaft rod 21 has an outer side of one end provided with male threads 213 to be correspondingly screwed with the threaded hole 231 of the first position-limiting block 23. The second position-limiting block 24 is disposed with a position-limiting hole 241 corresponding to another end of the shaft rod 21 for another end of the shaft rod 21 to be inserted therein. Further, the first position-limiting block 23 has one side provided with a first position-limiting stud 232, while the second position-limiting block 24 has one side formed with a second position-limiting stud 242. The first and the second position-limiting studs 232 and 242 have their circumferential sides respectively formed into a stepped shape. In this preferred embodiment, the shaft rod 21 can be fitted thereon with a membrance roll 200, which is a paper tube membrance roll. When the membrance roll 200 is to be fitted around the shaft rod 21, the interval of the first position-limiting block 23 and the interval of the second position-limiting block 24 of the membrance release unit 20 can be adjusted for corresponding with the length of the membracne roll 200 via the mutual thread connection relation that the threaded hole 231 of the first position-limiting block 23 is screwed with the male threads 213 of the shaft rod 21. Thus, the membrance strapping roll 200 can be restrictedly positioned by the membrance release unit 20 and, since the first position-limiting stud 232 and the second position-limiting stud 242 have their circumferential sides respectively formed with stepped surfaces; therefore, membrance rolls 200 of different diameters can be restrictedly positioned between the first and the second position-limiting blocks 23 and 24. One of the advantages of the membrance strapping apparatus 100 in the present invention is that membrance rolls 200 of various lengths and diameters can be fitted for use.

While the preferred embodiments of the invention have been described above, it will be recognized and understood that various modifications may be made therein and the appended claims are intended to cover all such modifications that may fall within the spirit and scope of the invention. 

What is claimed is:
 1. A membrance strapping apparatus comprising: a hold-pull rod, said hold-pull rod having two ends respectively extending to a same direction to form a combination rod and a base, said combination rod bored with a first positioning hole and a first fixing hole, said combination rod provided thereon with a quick-detaching member, said base disposed with a second positioning hole and a second fixing hole; a membrance release unit, said membrance release unit pivotally assembled between said base and said combination rod, said membrance release unit provided with a shaft rod, said shaft rod having two ends respectively formed with a first positioning member and a second positioning member respectively corresponding to said first positioning hole and said second positioning hole, said memberance release unit pivotally combined with said base and said combination rod by said first positioning member and said second positioning member; a roller unit, said roller unit assembled between said base and said combination rod, said roller unit composed of a first roller and a second roller, said first roller and said second roller having their same ends respectively fixed with a first gear and a second gear, said first gear meshed with said second gear, said first roller and said second roller having their outer sides respectively cover with a housing; and a pulling-force adjusting unit, said pulling-force adjusting unit positioned between said hold-pull rod and said roller unit, said pulling force adjusting unit comprising a positioning member, an elastic member and a control member, said elastic member having a fixed end connected with said hold-pull rod, said positioning member connected a free end of said elastic member, said positioning member able to be positioned on said hold-pull rod by elastic force of said elastic member, said control member connected with both said positioning member and said roller unit.
 2. The membrance strapping apparatus as claimed in claim 1, wherein said quick-detaching member consists of a spring and a shaft cover, said spring received in said first positioning hole and connected with said shaft cover, said shaft cover fitted on said first positioning member by resilience of said spring.
 3. The membrance strapping apparatus as claimed in claim 1, wherein said shaft rod of said membrance release unit has a circumferential side fixed thereon with a plurality of tightening sheets.
 4. The membrance strapping apparatus as claimed in claim 1, wherein number of gear teeth of said first gear is more than that of said second gear, and gear ratio of said first gear and said second gear is between 1.1 and 1.3.
 5. The membrance strapping apparatus as claimed in claim 1, wherein said roller unit contains a first connecting rod and a second connecting rod, which are respectively set in said first roller and said second roller, said first connecting rod and said first roller being coaxial, said second connecting rod and said second roller provided coaxially, said first connecting rod and said second connecting rod respectively having their two ends protruding out of said housings, said first connecting rod having two ends respectively and pivotally combined with said first fixing hole and said second fixing hole, said second connecting rod secured with said housings.
 6. The membrance strapping apparatus as claimed in claim 1, wherein said positioning member is a positioning ring, said positioning member provided with a plurality of positioning recesses corresponding to said combination rod, said elastic member is a spring, said elastic member received in said first fixing hole, said control member being a control rod, said control rod having one end connected with said housing adjacent to a location of said second roller and another end connected with said positioning ring.
 7. The membrance strapping apparatus as claimed in claim 1, wherein said membrance release unit includes a first position-limiting block and a second position-limiting block, said first position-limiting block having a central portion bored with a threaded hole, said shaft rod having one end provided with male threads at an outer circumferential side, said second position-limiting block disposed with a position-limiting hole corresponding to another end of said shaft rod.
 8. The membrance strapping apparatus as claimed in claim 7, wherein said first position-limiting block has one side secured with a first position-limiting stud and said second position-limiting block having one end fixed with a second position-limiting stud, said first position-limiting stud and said second position-limiting stud having their circumferential sides respectively formed with stepped surfaces.
 9. The membrance strapping apparatus as claimed in claim 1, wherein said base with a combination hole at a location corresponding to one side of said combination rod, said hold-pull rod having one end formed with a threaded hole corresponding to said combination hole, said membrance strapping apparatus comprising a telescopic rod, said telescopic rod having one end correspondingly inserted in said combination hole of said base, said telescopic rod threadably combined with said threaded hole of said hold-pull rod. 